Strokinit383

iTrader: (22)

Does anyone know or have a link to all the bolt sizes for a small block chevy?

I know the harmonic damper is 7/16 - 20 x 2.25 and the cam bolts are 5/16 - 18 x 3/4 and the exhaust manifold bolts are 3/8 - 16 x 3/4.

Anyone know the sizes of the 3 different head bolts, main bolts 4 or 2 bolt, oil pan bolts, oil pump bolt (I think this one is 7/16 - 14 x 2.25 but im not sure), intake manifold, valve cover, thermostat housing, distributor, timing cover, water pump, all accessories (alternator, pulleys, etc.)

I think this would be very helpful to anyone building a sbc. Too late ive already bought all of my bolts in a kit or i wouldve definitely taken advantage of this. I guess it would be easiest to just start a running list.

Harmonic damper = 7/16 - 20 x 2.25
Cam bolts = 5/16 - 18 x 3/4
Exhaust manifold bolts = 3/8 - 16 x 3/4
Oil pump = 7/16 - 14 x 2.25

terr1bleone

iTrader: (1)

your going to need a few more sizes, 5/8, 9/16, 1/2 and those are all the sizes i needed to build my motor.

Strokinit383

iTrader: (22)

Harmonic damper = 7/16 - 20 x 2.25
Cam bolts = 5/16 - 18 x 3/4
Exhaust manifold bolts = 3/8 - 16 x 3/4
Oil pump = 7/16 - 14 x 2.25
oil pan, valve covers, and timing cover = 1/4-20x3/4
oil pan also has four 5/16-18x3/4
intake manifold = 3/8-16x1.25

Strokinit383

iTrader: (22)

What??? That didnt make any sense.

terr1bleone

iTrader: (1)

yeah, all the sizes that you listed, plus parts like the rocker arms 5/8, distributer 9/16, and carb 1/2. there arent any set sizes for sbc bolts, my headbolts, rocker arms, balancer, and waterpump/filler neck are 5/8, my intake manifold, dist, and misc accessories are 9/16. take for example your exhuast manifolds are 3/8. mine are 7/16.

twoduners11

iTrader: (8)

not to be a smart ***, but the sizes your reffering to are the fractions printed on your WRENCH not the actual size of the fastner. but seriously go to your local hardware store w/ a few of your wrenches and spend some time in the bolt bins. its actually fun to learn. and a whole new world will open up for ya
have fun
mark

terr1bleone

iTrader: (1)

yeah, i wasnt even paying attention. i thought this was about what wrenches you would need to build a motor. sorry.

Strokinit383

iTrader: (22)

What i have so far:

Coil Bracket:5/16-18 x 9/16
Distributor Hold-down:3/8-16 x 1/2
Fuel Pump:3/8-16 x 1 1/4
Fuel Pump Plate:1/4-20 x 1/2
Intake:3/8-16 x 1.25
Motor Mounts:3/8-16 x 3/4
Oil Pan:1/4-20 x 1/2, 5/16-18 x 9/16 (or 5/16-18 x ¾)
Timing cover:1/4-20 x 1/2
Valve Covers (perimeter):1/4-20 x 1/2
Water Neck:3/8-16 x 1, 3/8-16 x 2
Water Pump:3/8-16 x 2, 3/8-16 x 2 ½
Harmonic damper = 7/16 - 20 x 2.25
Cam bolts = 5/16 - 18 x 3/4
Header bolts = 3/8 - 16 x 3/4
Oil pump = 7/16 - 14 x 2.25

BSR29ss

I was wondering if you guys have bolt sizes for a Holley 4412, 1 inch spacer onto a 1979 SBC 350?

5/16-18 x ???